| Business | Phone |
| Integrated Information Systems 1222 Allanson Rd, Mundelein 60060 | (847) 918-1800 |
| Aldridge Electric 1001 Allanson Rd, Mundelein 60060 | (847) 949-1420 |
| Aldridge Electric Inc 1341 Leighton Tower Rd, Mundelein 60060 | (847) 837-9761 |
| Kas Electric Corp 27578 N Owens Rd, Mundelein 60060 | (847) 566-3332 |
| Randlev Electric Co 48 S Shaddle Ave, Mundelein 60060 | (847) 475-1231 |